one-on-onePronunciation: (wun'on-wun', -ôn-), [key]
consisting of or involving direct individual competition, confrontation, or communication; person-to-person: a one-on-one discussion.
in direct encounter: I'd rather settle this with her one-on-one.
2. go one-on-one with, Sports.
to play directly against (an opposing player).
a meeting or confrontation between two persons.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.